SVGs to validate/calibrate belt tension?

Mostly Printed CNC - MPCNC Troubleshooting
1

I’ve been struggling with some issues that I thought were Estlcam completing tool paths ( Estlcam has some occasional mis-moves - is it my source image, my MPCNC, or engraving settings? - #45 by vicious1 )

I still suspect that maybe belt tension is at issue. I’ve set tension by twanging and also by using a pretty sensitive sax tuner app to get the actual sound frequency of each section of belt and adjust them so they are within 1-2hz of each other. I’m still seeing my issues, so I was wondering if there was an SVG I could make into a tool path that helps me identify which tensioners need to be loosened or tightened.

I’m using a Primo with dual endstops, if it makes a difference for testing.

Does such a calibration or test pattern exist?

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Let’s keep this all in your other thread.

Belt tension is not much of a thing to worry about, if yours make noise they are on the very tight side, but fine. The belts have a range of like 3-9lbs tension, they are fiber reinforced.